CVE-2025-38058

Summary

In the Linux kernel, the following vulnerability has been resolved:

__legitimize_mnt(): check for MNT_SYNC_UMOUNT should be under mount_lock

… or we risk stealing final mntput from sync umount - raising mnt_count after umount(2) has verified that victim is not busy, but before it has set MNT_SYNC_UMOUNT; in that case __legitimize_mnt() doesn't see that it's safe to quietly undo mnt_count increment and leaves dropping the reference to caller, where it'll be a full-blown mntput().

Check under mount_lock is needed; leaving the current one done before taking that makes no sense - it's nowhere near common enough to bother with.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux48a066e72d970a3e225a9c18690d570c736fc455 < 628fb00195ce21a90cf9e4e3d105cd9e58f77b40affected
LinuxLinux48a066e72d970a3e225a9c18690d570c736fc455 < b89eb56a378b7b2c1176787fc228d0a57172bdd5affected
LinuxLinux48a066e72d970a3e225a9c18690d570c736fc455 < f6d45fd92f62845cbd1eb5128fd8f0ed7d0c5a42affected
LinuxLinux48a066e72d970a3e225a9c18690d570c736fc455 < 9b0915e72b3cf52474dcee0b24a2f99d93e604a3affected
LinuxLinux48a066e72d970a3e225a9c18690d570c736fc455 < d8ece4ced3b051e656c77180df2e69e19e24edc1affected
LinuxLinux48a066e72d970a3e225a9c18690d570c736fc455 < 8cafd7266fa02e0863bacbf872fe635c0b9725ebaffected
LinuxLinux48a066e72d970a3e225a9c18690d570c736fc455 < b55996939c71a3e1a38f3cdc6a8859797efc9083affected
LinuxLinux48a066e72d970a3e225a9c18690d570c736fc455 < 250cf3693060a5f803c5f1ddc082bb06b16112a9affected
LinuxLinux3.13affected
LinuxLinux0 < 3.13unaffected
LinuxLinux5.4.294 <= 5.4.*unaffected
LinuxLinux5.10.238 <= 5.10.*unaffected
LinuxLinux5.15.185 <= 5.15.*unaffected
LinuxLinux6.1.141 <= 6.1.*unaffected
LinuxLinux6.6.93 <= 6.6.*unaffected
LinuxLinux6.12.31 <= 6.12.*unaffected
LinuxLinux6.14.9 <= 6.14.*unaffected
LinuxLinux6.15 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

Additional References

References